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Soot combustion; Ceria; Ternary mixed oxide; Cordierite coating; Diesel particulate filter

Journal of Environmental Sciences 2018年第11期30卷 58-68页

作者： Leandro Fontanetti Nascimento Juliana Fonseca Lima paulo Cesar de sousa Filho Osvaldo Antonio Serra Department of Chemistry FFCLRP University of Sao Paulo 14040-901 Ribeirao Preto Sao Paulo Brazil Institute of Chemistry Rio de Janeiro State University 20550-900 Rio de Janeiro Rio de Janeiro Brazil Institute of Chemistry Uniuersity of Campinas 13083-970 Campinas Silo Paulo Brazil Center of-Natural and Human Sciences Federal Uniuerty of ABC 09210-580 Santo Andre Sao Paulo Brazil

We report the application of a solid lanthanum-ceria-zinc catalyst in the catalytic regeneration of diesel particulate filters （DPF） in diesel engines. We synthesized a CeO2- ZnO-La2O3 （Ce-Zn-La） mixed oxide by a lactic acid-mediated sol-gel method, which efficiently coated cordierite substrates for soot capture and combustion. We studied the effects of La loading on the physicochemical and catalytic properties of Ce-Zn mixed oxide during lowtemperature soot combustion processes. We characterized the synthesized catalysts by X-ray diffraction （XRD）, Fourier-transform infrared spectroscopy （FTIR）, N2 adsorption, Raman spectroscopy, oxygen storage capacity （OSG）, and scanning and transmission electron microscopy （SEM and TEM）. Thermogravimetric and differential thermal analysis （TGA/DTA） confirmed that the catalysts effectively reduced the soot oxidation temperature. The ternary Ce-Zn-La mixed oxide catalyst with Ce/Zn/La atomic ratio of 2：1：0.5 had the highest catalytic activity and promoted soot oxidation at temperatures below 390℃. This indicated that the large number of oxygen vacancies in the catalyst structure generated oxygen species at low temperatures. Raman spectroscopy measurements revealed the presence of oxygen vacancies and lattice defects in Ce-Zn-La samples, which were key parameters concerning the stability and redox properties of the prepared catalysts.

关键词： Soot combustion Ceria Ternary mixed oxide Cordierite coating Diesel particulate filter

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Impact of COVID-19 pandemic on the ocular surface

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World Journal of Clinical Cases 2022年第27期10卷 9619-9627页

作者： Ana Marta Joao Heitor Marques Daniel Almeida Diana José paulo sousa Irene Barbosa Department of Ophthalmology Centro Hospitalar Universitário do PortoPorto 4099-001Portugal

BACKGROUND There have been increased reports of dry eyes in the coronavirus disease 2019(COVID-19) pandemic *** To analyze the differences in tear film properties from pre-and post-pandemic of the COVID-19 *** It was a retrospective comparative *** were divided into three groups according to the data of multimodal ocular surface evaluation:(1) Group 1 if it was before Portugal lockdown decision(from August 2019 to March 2020);(2) Group 2 if it was after Portugal lockdown decision but without mask mandate(from April 2020 to October 2020);and(3) Group 3 if it was after Portugal lockdown but with mask mandate in health public highway(from November 2020 to April 2021).The following variables were analyzed:Lipid layer thickness,blink rate,Schirmer test,tear meniscus height,tear osmolarity,non-invasive break-up time,and loss area of the meibomian *** The study included 548 eyes of 274 patients,aged 18 years to 89 years,with a mean age of 66.15 ± 13.40 years at the time of multimodal ocular surface *** to group 1:(1) Mean lipid layer thickness was better in group 2(P = 0.001) and group 3(P < 0.001);(2) Schirmer test was similar in group 2(P = 0.576) and better in group 3(P = 0.002);(3) Tear osmolarity and loss area of the meibomian glands were worse in group 2(P = 0.031 and P < 0.001,respectively) and in group 3(both with P < 0.001);(4) Blink rate and tear meniscus height were similar in group 2(P = 0.821 and P = 0.370,respectively) and worse in group 3(P < 0.001 and P = 0.038,respectively);and(5) Non-invasive break-up time was worse in group 2(P = 0.030) and similar in group 3(P = 0.263).CONCLUSION Our study demonstrated that differences existed in tear film properties comparing data from the pre-and post-pandemic of the COVID-19 era.

关键词： Ocular surface Dry eye Face masks Mask-associated dry eye COVID-19 pandemic

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Red deer as a disperser of native,but not invasive plants’seeds

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Integrative Zoology 2023年第5期18卷 859-866页

作者： Fernanda GARCIA António ALVES DA SILVA Ruben HELENO Josépaulo sousa Joana ALVES Centre for Functional Ecology(CFE) TERRA Associate LaboratoryDepartment of Life SciencesUniversity of CoimbraCoimbraPortugal

INTRODUCTION Seed dispersal is a key process in the life cycle of most plants,with ecological and evolutionary consequences that go beyond vegetation dynamics and cascade to entire ecosystem functioning and stability(Traveset et al.2014).Seed dispersal largely constrains plant recruitment and the distribution of future plant cohorts,thus playing a critical role in the restoration of disturbed sites(Cain et al.2000;Higgins et al.2003).It can also threaten plant diversity by facilitating plant invasions(Vavra et al.2007;Heleno 2020).

关键词： consequences disperse disturbed

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Determination of critical state line(CSL)for silty-sandy iron ore tailings subjected to low-high confining pressures

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1684-1695页

作者： Nilo Cesar Consoli João Vítor de Azambuja Carvalho Alexia Cindy Wagner Hugo Carlos Scheuermann Filho Inácio Carvalho Pedro Pazzoto Cacciari João paulo de sousa Silva Civil Engineering Universidade Federal do Rio Grande do SulPorto AlegreRS90035-190Brazil Exploration and Mineral Projects-Mineral Development Centre VALE S.A.Santa LuziaMG33040-900Brazil Department of Civil Geological and Mining EngineeringPolytechnique MontrealQuebecH3C 3A7Canada

The disposal of filtered tailings in high dry stacks can induce particle breakage,changing the material's behaviour during the structure's *** grading changes influence material properties at the critical state,and this is not mature for intermediate artificial soils(tailings)in a broad range of confining *** this paper,it aims to describe the behaviour of iron ore tailings in a spectrum of confining pressures broader than the reported in previous studies.A series of consolidated drained(CD)triaxial tests was carried out with confining pressures ranging from 0.075 MPa to 120 *** results show that the amount of breakage plays an essential role in the response of iron ore *** existence of curved critical state line(CSL)in both specific volume(ν)-logarithm of mean effective stress(p′)and deviatoric stress(q)-mean effective stress(p′)planes,and different responses in the deviatoric stress-axial strain-volumetric strain curves were *** inverse S-shaped equation was proposed to represent the silty-sandy tailings'behaviour up to high pressures onν-lnp′*** proposed equation provides a basis for enhancing constitutive models and considers the evolution of the grading up to severe loading *** adjustment considered three regions with different responses associated with particle breakage at different pressure levels.

关键词： Tailings Iron ore tailings dry stacking Silty-sandy material Critical state soil mechanics High confining pressures Particle breakage

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Mechanical behavior of iron ore tailings under standard compression and extension triaxial stress paths

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第7期15卷 1883-1894页

作者： Alexia Cindy Wagner João paulo de sousa Silva João Vítor de Azambuja Carvalho Ana Luisa Cezar Rissoli Pedro Pazzoto Cacciari Helder Mansur Chaves Hugo Carlos Scheuermann Filho Nilo Cesar Consoli Universidade Federal do Rio Grande do Sul Porto Alegre90035-190Brazil Mineral Development Centre Vale S.A.Santa Luzia33040-900Brazil Department of Civil Geological and Mining EngineeringPolytechnique MontrealMontrealH3C 3A7Canada

The disposal of mining tailings has increasingly focused on the use of dry *** structures offer more security since they use filtered and compacted *** of the construction method and the heights achieved,the material that compounds the structure can be subjected to different stress paths along the failure *** theoretical framework considered in the design of these structures generally is the critical state soil mechanics(CSSM).However,the data in the literature concerning the uniqueness of critical state line(CSL)is still controversial as the soil is subjected to different stress *** respect to tailings,this question is even more *** paper studies two tailings with different gradings due to the beneficial processes over extension and compression paths.A series of drained and undrained triaxial tests was conducted over a range of initial densities and stress *** the q-p'plane,different critical stress ratio(M)values were obtained for compression and extension stress ***,the critical state friction angle is very similar with a slightly higher critical state friction angle for extension *** stress path dependent CSLs were obtained in the n-lnp0 plane with the extension tests below the CSL defined in *** the fines content,the studied tailings presented very similar M and critical state friction angle ***,the fines content af-fects the volumetric behavior of the studied tailings and the CSLs on the n-lnp0 plane shift downwards with the increasing fines content for compression and extension *** relation to dilatancy analysis,the fines content did not present an evident influence on the dilatancy of the ***,different values of mean stress ratio N were obtained between compression and extension tests and can corroborate the existence of non-unique CSLs for these materials.

关键词： Iron ore tailings(IOTs) Dry stacking Critical state soil mechanics Extension tests Stress path

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The influence of the blood pressure on the venous cerebral flow measured by magnetic susceptibility (SWI) technique

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Journal of Biomedical Science and Engineering 2013年第3期6卷 426-434页

作者： Hugo Martins Marlene Carreiras M. Margarida Ribeiro paulo sousa Carina Silva-Forte Anatomy Department Medical Sciences Faculty of Lisbon Lisbon Portugal Department of Exact Sciences Scientific Area of Mathematic from Polytechnic Institute Lisbon Portugal Department of Sciences and Radiation Technologies Scientific Area of Radiology from Polytechnic Institute Lisbon Portugal Imaging Department Lusiadas Hospital Lisbon Portugal

Susceptibility Weighted Image (SWI) is a Magnetic Resonance Imaging (MRI) technique that combines high spatial resolution and sensitivity to magnetic susceptibility differences between tissues, it is extremely sensitive to venous blood due to its iron content of deoxyhemoglobin. The aim of this study was to evaluate the differences in the cerebral venous vasculature produced by the value’s variation of blood pressure. 20 subjects (10 hypertensive and 10 normotensive patients) underwent a MRI system with field strength of 1.5 T using a synergy head coil (7 channels). The obtained sequences were T1w, T2w-FLAIR, T2* and SWI. The value of Contrast-to-Noise Ratio (CNR) was assessed in MinIP (Minimum Intensity Projection) and Magnitude images, through drawing free hand ROIs in venous structures: Superior Sagittal Sinus (SSS) Internal Cerebral Vein (ICV) and Sinus Confluence (SC). The obtained values were presented in descriptive statistics-quartiles and extremes diagrams. The results were compared between groups. CNR shown higher values for normotensive group in MinIP (108.89 ± 6.907) to ICV;(238.73 ± 18.556) to SC and (239.384 ± 52.303) to SSS. These values are bigger than images from Hypertensive group about 46 au in average. Comparing the results of Magnitude and MinIP images, there were obtained lower CNR values for the hypertensive group. There were differences in the CNR values between both groups, being these values more expressive in the large vessels-SSS and SC. The SWI is a potential technique to evaluate and characterize the blood pressure variation in the studied vessels adding a physiological perspective to MRI and giving a new approach to the radiological vascular studies.

关键词： Blood Pressure Susceptibility Normotensive Hypertensive Magnetic Resonance

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Case Report： Myxoid Liposarcoma in Retroperitoneum

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Journal of Pharmacy and Pharmacology 2018年第6期6卷 587-594页

作者： Janaina Gomes da Silva Cirqueira Jefferson Luiz Rodrigues Nascimento paulo Henrique de sousa Fernaxldes Department of Surgery Federal University of Uberlandia Clinical Hospital of Federal University of Uberlandia Uberlandia - MG38402-022 Brazil

Liposarcoma is a malignant neoplasm of mesodermal origin, which among sarcomas, 10% to 20% are located in the retroperitoneum. The case presented shows a 50-year-old male patient who initially presented weight loss and abdominal pain in the left iliac fossa. A tumor mass of hardened consistency was palpated in virtually all the abdomen. An abdominal ultrasound and a computed tomography of the abdomen were performed and confirmed the tumor mass. An exploratory laparotomy was performed, with removal of bulky abdominal mass of greasy consistency. A histopathological study of the piece reported myxoid liposarcoma. Clinical and prognostic features, as well as oncologic outcomes, are well known in this group of patients. The patient has been in the outpatient clinic for 7 years without tumor recurrence. Computed tomography is the fundamental study for the diagnosis of imaging. The treatment of choice consists in an aggressive approach aiming the complete resection, which is a major predictor of local and distant recurrence and survival.

关键词： Myxoid liposarcoma retroperitoneum surgery.

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Complications of Surgical Treatment of Anterior Shoulder Dislocation:A Systematic Review

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Open Journal of Orthopedics 2017年第9期7卷 241-253页

作者： Walter Hugo Brandao Nascimento Lailson Oliveira de Castro Liwerbeth dos Anjos Pereira Joao paulo Pimentel de sousa paulo Renan Matos Sucupira Cunha Rodrigo Martins Silva Caetano Resident Physician in Orthopedics and Traumatology University Hospital of the Universidade Federal do MaranhaoSao LuísBrazil Scholarship Holder Conselho Nacional de Desenvolvimento Cientifico e Tecnologico(CNPq)Sao LuisBrazil Preceptor of the Medical Residency in Orthopedics and Traumatology University Hospital of the Universidade Federal do MaranhaoSao LuisBrazil

Introduction: shoulder joint has the greatest range of motion in the human body. The shoulder anatomy promotes high mobility and favors relative sacrifice of articular stability, making it susceptible and more prone to events of instability and dislocation. This review aimed at identifying main complications of surgical treatment of anterior shoulder dislocation. Methodology: This systematic review was conducted according to the International Preferred Reporting Items for Systematic Reviews and Meta-Analyzes (PRISMA) guidelines. Studies which were eligible for this systematic review included: English or Spanish language, studies published from 2000, which mentioned surgical complications of anterior shoulder dislocation in their results, both in open and arthroscopic surgery. Included studies which were required to have at least 1 complication following surgical repair. Only studies from original data were included. Results: We found 228 potentially eligible studies for the survey. Through the inclusion and exclusion criteria and after consensus among reviewers, we chose 9 studies to compose the systematic review. Conclusion: Important information emerges: recurring instability, recurring dislocation, external rotation limitation and arthritis are main surgical complications of anterior shoulder dislocation.

关键词： Surgical Complications Anterior Shoulder Dislocation and Recurrences

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Visualizing traumatic brain injury:ocular clues for diagnosis and assessment

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Neural Regeneration Research 2025年第5期20卷 1399-1400页

作者： Morteza Abyadeh Vivek Gupta Yuyi You Joao A.paulo Mehdi Mirzaei ProGene Technologies Pty Ltd SydneyNSWAustralia Department of Clinical Medicine Faculty of MedicineHealth and Human SciencesMacquarie Medical SchoolMacquarie UniversityMacquarie ParkNorth RydeSydneyNSWAustralia Department of Cell Biology Harvard Medical SchoolBostonMAUSA

Traumatic brain injury (TBI) is defined as damage to the brain resulting from an external sudden physical force or shock to the *** is considered a silent public health epidemic causing significant death and disability *** were 64,000 TBI related deaths reported in the USA in 2020,with about US$76 billion in direct and indirect medical costs annually.

关键词： diagnosis ocular injury

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Rainfall erosivity and erosivity density through rainfall synthetic series for Sao paulo State,Brazil:Assessment,regionalization and modeling

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International Soil and Water Conservation Research 2022年第3期10卷 355-370页

作者： David Bruno de sousa Teixeira Roberto Avelino Cecílio Joao paulo Bestete de Oliveira Laura Thebit de Almeida Gabrielle Ferreira Pires Department of Agricultural Engineering Federal University of ViçosaViçosaMG36570-900Brazil Department of Forest and Wood Sciences Federal University of Espírito SantoJer^onimo MonteiroES29550-000Brazil Federal Institute of Espírito Santo Campus AlegreAlegreES29520-000Brazil

Rainfall is the main cause of erosion of Brazilian soils,which makes assessing the rainfall erosivity factor(RE)and the erosivity density(ED)fundamental for soil and water ***,the objectives of this study were:i)to estimate the RE and ED for Sao paulo State,Brazil,using synthetic series of pluviographic data;ii)to define homogeneous regions regarding rainfall erosivity;and iii)to generate regression models for rainfall erosivity estimates in each of the homogeneous *** series of pluviographic data were initially obtained on a sub-daily scale from the daily rainfall records of 696 rainfall *** RE values were then estimated from the synthetic rainfall data,and ED was calculated from the relationship between erosivity and rainfall *** and annual maps for RE and ED were *** clustering analysis was used to define homogeneous regions in terms of rainfall erosivity,and regionalized regression models for estimating RE were *** results demonstrate high spatial variability of RE in Sao paulo,where the highest annual values were observed in the coastal *** to March concentrate approximately 60%of the intra-annual *** highest values of annual ED were observed in regions with intense agricultural *** definition of five homogeneous regions concerning the rainfall erosive potential evidenced distinct seasonal patterns of the spatial distribution of ***,the high predictive accuracy of the regionalized models obtained characterizes them as essential tools for reliable estimates of rainfall erosivity,and contribute to better soil conservation planning.

关键词： Soil erosion Stochastic weather generator Homogeneous regions Modified Fournier index Regression models

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